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. 2013 Jun 6;3(3):20120098. doi: 10.1098/rsfs.2012.0098

Figure 1.

Figure 1.

Characterization of sizes and stability (non-aggregation) of the Au NPs suspended in egg water (20 pM) at 28.5°C over 120 h. (A,B): (a) High-resolution TEM images of the Au NPs that had been suspended in egg water for: (A) 0 and (B) 120 h, showing single ellipse-shaped NPs. (b) Histograms of the size distributions of single Au NPs measured by high-resolution TEM show average sizes of NPs: (A) (85.4 ± 11.6) and (B) (86.2 ± 10.8) nm. Sizes are calculated by averaging the length and width of each NP, and their aspect ratios range from 0.9 to 3.8. (C) Histograms of size distributions of the NPs dispersed in egg water and measured by DLS show that their average sizes are (a) (86.3 ± 9.0) and (b) (87.9 ± 9.4) nm for 0 and 120 h, respectively. (D) UV–vis absorption spectra of the Au NPs in (C) at: (a) 0 and (b) 120 h, showing that the λmax (FWHM) at 550 (102 ± 4) nm remains unchanged over time. Scale bars in (A,B) are 100 nm.